Thermal conductivity is a material property describing the ability to conduct heat. Thermal conductivity can be defined as
"the quantity of heat transmitted through a unit thickness of a material - in a direction normal to a surface of unit area - due to a unit temperature gradient under steady state condi
tions"glass has the highest thermal conductivity compare to plastic and wood because it can transfer heat faster.This is followed by plastic and wood. Wood has the lowest thermal conductivity but is good to be a heat insulator. wood transfer heat at slower rate.... :)